So far I've found lots of software with huge spread of features. It's sort of overwhelming. There is lots of ways to create images into 3D printable objects but to add the extra step and concaving that image is harder to find out.

$\begingroup$What are you using for your modeling software?$\endgroup$
– Pᴀᴜʟsᴛᴇʀ2Jun 12 '19 at 0:42

$\begingroup$I have not selected a modeling software. I'm a programmer and I work with software everyday therefore I'm open to tryout anything.$\endgroup$
– ForgottenKahzJun 12 '19 at 1:02

$\begingroup$3dp.rocks/lithophane can do the interior of a cylinder; I haven't found a free site that will project into a sphere, but I strongly suspect you can take a planar model and use one of the standard CAD/mesh programs to make it spherical. Maybe search YouTube for tutorials on "convert plane to hemisphere" ?$\endgroup$
– Carl WitthoftJun 12 '19 at 15:43

1 Answer
1

What you describe, sounds like you want to create a lithophane; a pattern etched or engraved on a thin translucent base material (in your case a bowl) that can only be seen clearly when backlit with a light source behind it. Apparently you want to use it for another purpose.

Special software and or scripts that transform the image to the base material exist. An example is e.g. this sphere which becomes a globe when lit from the inside. Recommending a tool for creating such bowl is a little out of scope as these types of questions become outdated very quickly as technology changes or tools cease to exist. With the provided information you should be able to find software that is able to provide what you want to do.